M-Family
DC-DC Converters <100 W
Rugged Environment
50 W DC-DC (AC-DC) Converters
M-Family
Class I Equipment
Single output: series AM...LM 1000
Dual output:
series AM...LM 2000
Triple output: series AM...LM 3000
Class II Equipment (double insulation)
Single output: series CMZ/DMZ/LMZ 1000
Dual output:
series CMZ/DMZ/LMZ 2000
Triple output: series CMZ/DMZ/LMZ 3000
• Extremely wide input voltage range suitable for
battery (and AC) operation
• Efficient input filter and built-in surge and transient
suppression circuitry
• 4 kVrms input to output electric strength test
• Outputs individually isolated and controlled
• Outputs fully protected against overload
Safety according to IEC 950
LGA
C
Table of Contents........................................... Page
Description .................................................................. 7 - 2
Type Survey ................................................................ 7 - 3
Safety and Installation Instructions ............................. 7 - 4
Functional Description................................................. 7 - 6
Electrical Input Data .................................................... 7 - 7
Electrical Output Data ................................................. 7 - 9
EMC and Immunity to Input Transients ..................... 7 - 13
Supplementary Data ................................................. 7 - 15
Description of Options............................................... 7 - 16
Immunity to Environmental Conditions...................... 7 - 22
Mechanical Data ....................................................... 7 - 24
Type Key and Product Marking ................................. 7 - 25
Description
The M-family of DC-DC (AC-DC) converters represents a
broad and flexible range of power supplies for use in ad-
vanced industrial electronic systems. Features include high
efficiency, reliability, low output voltage noise and excellent
dynamic response to load/line changes due to individual
regulation of each output.
to output isolation is provided. The modules are designed
and built according to the international safety standard
IEC 950 and have been approved by the safety agencies
LGA (Germany) and UL (USA). The UL Mark for Canada
has been officially recognized be regulatory authorities in
provinces across Canada.
The converter inputs are protected against surges and tran-
sients occuring at the source lines. An input over- and
undervoltage cut-out circuitry disables the outputs if the in-
put voltage is outside the specified range. Certain types in-
clude an inrush current limitation preventing circuit break-
ers and fuses from being damaged at switch-on.
The case design allows operation at nominal load up to
71°C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 71°C but
the case temperature should remain below 95°C under all
conditions.
A temperature sensor generates an inhibit signal which
disables the outputs if the case temperature TC exceeds the
limit. The outputs are automatically re-enabled when the
temperature drops below the limit.
All outputs are open- and short-circuit proof and are pro-
tected against overvoltages by means of built-in suppres-
sor diodes. The outputs can be inhibited by a logic signal
applied to the connector pin 2 (i). If the inhibit function is not
used pin 2 should be connected with pin 23 to enable the
outputs.
Various options are available to adapt the converters to in-
dividual applications.
The modules may either be plugged into 19 inch rack sys-
tems according to DIN 41494, or be chassis mounted.
LED indicators display the status of the converter and allow
visual monitoring of the system at any time.
Case: aluminium, black finish, self cooling.
Dimensions: 38.7 × 111.2 × 168.5 mm. Weight: 770 g.
Full input to output, input to case, output to case and output
7 - 2
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.